Does anybody recognize any pattern/antipattern in attached class diagram?

Question

alt text http://img8.imageshack.us/img8/8558/classdiagram.png

Short description: I have a doubt whether it's normal that AbstractCrudDaoImpl implements both interface and abstract class which are inherited from the same parent (ReadOnlyDao).

Answer 1

Unless you have some special method defined in AbsractReadOnlyDaoImpl which is not in the ReadOnlyDao interface, that specific inheritance is pretty much useless.

Otherwise, looks fine.